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Finding the Fourth Proportional to 312,675.67, 431,490.63 and 169,435.72

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Solution

The fourth proportional to 312,675.67, 431,490.63 and 169,435.72 is: 233,820.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,675.67 : 431,490.63 = 169,435.72 : x
  2. Step 2: Convert to fraction form
    312,675.67/431,490.63 = 169,435.72/x
  3. Step 3: Cross multiply
    312,675.67x = 431,490.63 × 169,435.72
  4. Step 4: Simplify right side
    312,675.67x = 73,109,925,567.30
  5. Step 5: Solve for x
    x = 73,109,925,567.30/312,675.67
  6. Step 6: Final answer
    x = 233,820.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.